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Type-specific sensitivity versus detection breadth in HPV diagnostics: improved analytical detection of HPV16/18 by
Yago Tomaz Vieira da Silva1, Larissa Alves Honorato Ferreira1, Samara Fontes de Lima Gomes1
1Applied Molecular Biology Laboratory (LAPLIC), Department of Biochemistry, Federal University of Rio Grande do Norte, Campus Universitário, Lagoa Nova, Natal, RN, CEP 59078-970, Brazil.
Highly sensitive nested PCR assays for human papillomavirus (HPV) detected more high-risk HPV16/18 DNA in cervical samples than broad-spectrum assays. This highlights the importance of analytical sensitivity for accurate HPV detection in cervical cancer screening.
Area of Science:
- Molecular Biology
- Oncology
- Virology
Background:
- Accurate detection of high-risk human papillomavirus (HPV) is crucial for cervical cancer screening.
- Current strategies favor broad-spectrum assays for maximum genotype coverage.
- Broad genotype coverage may not ensure effective detection, especially for low-copy-number targets.
Purpose of the Study:
- To evaluate the analytical trade-off between genotype breadth and detection sensitivity in HPV testing.
- To compare the performance of type-specific nested PCR versus broad-spectrum consensus PCR assays.
- To assess the impact of target abundance on diagnostic accuracy in HPV screening.
Main Methods:
- Development and application of type-specific nested PCR assays for HPV16 and HPV18.
- Testing of 41 clinical cervical samples using nested PCR and broad-spectrum consensus systems (MY09/11, GP5/6).
- Comparative analysis of analytical sensitivity and detection rates between different PCR methods.
Main Results:
- Nested PCR demonstrated significantly higher relative analytical sensitivity than single-round amplification.
- Nested PCR detected HPV16/18 DNA in 22/41 samples, compared to 11/41 (MY09/11) and 2/41 (GP5/6).
- Type-specific nested PCR yielded a greater proportion of specific and interpretable detections.
Conclusions:
- Effective sample detection and broad genotype coverage are distinct analytical properties in HPV testing.
- Highly sensitive, genotype-focused assays may outperform broader, less sensitive consensus approaches for low-abundance targets.
- Preserving per-target analytical sensitivity is vital for reflex testing and future multi-target HPV assay design.